4201391 has 2 divisors, whose sum is σ = 4201392. Its totient is φ = 4201390.

The previous prime is 4201367. The next prime is 4201409. The reversal of 4201391 is 1931024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4201391 - 2¹⁴ = 4185007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4201321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2100695 + 2100696.

It is an arithmetic number, because the mean of its divisors is an integer number (2100696).

Almost surely, 2^4201391 is an apocalyptic number.

4201391 is a deficient number, since it is larger than the sum of its proper divisors (1).

4201391 is an equidigital number, since it uses as much as digits as its factorization.

4201391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 4201391 is about 2049.7294943480. The cubic root of 4201391 is about 161.3606743765.

The spelling of 4201391 in words is "four million, two hundred one thousand, three hundred ninety-one".